PCLinuxOS does something similar, if I'm not mistaken.

I am quite amazed at the extent of the updates available. I do a weekly reload and update and the least I have had was about 30 - last Sunday there were 129. Thank goodness it's Linux and not Windoze - the updating is painless and just ticks away in the background, no demands to reboot although last Sunday it did advise me very politely that I might want to - something like, "Excuse me mate, but I've just updated KDE, if you do a restart it'll all work a lot better, but it's up to you and no skin off my nose".

The Repos are also excellent. I have yet to find anything not in there to install with Synaptic when I look around and think, "Hmmm I wouldn't mind trying that".